Most Helpful Guy
Well most guys are simple, not simple minded. (well some guys aren't.)
Most guys do think about perverted stuff here and there a lot. Sometimes they think about friends naked or in bed or etc.
Almost all guys masturbate, and sometimes even when you don't think they are doing so, like on the phone, or webcam, etc. They might try to hide it but I'm sure they are up to something.
Another thing is men think if girls wear a short skirt or tight revealing clothing, they think they could possible score with her. Men are more physical then females, so in a way they are a little bit more shallow.